Waveform shaping device

A waveform shaping device comprising:

• a clock oscillator for generating clock pulses;
• an inverter amplifier having a high input impedance for receiving said clock pulses through an alternating current coupling capacitor;
• diodes in anti-parallel connection for limiting an amplitude of an output of said inverter amplifier symmetrically in a positive and a negative sides, said diodes being disposed between an input and an output of said inverter amplifier as feedback elements;
• and
• a first current-limiting impedance and a second current-limiting impedance connected between a power supply side terminal of said inverter amplifier and a power supply bus and between a grounding side terminal of said inverter amplifier and a grounding bus, respectively.

A waveform shaping device comprising:

• a ring counter for generating clock pulses;
• an inverter amplifier for receiving said clock pulses through an alternating current coupling capacitor;
• a non-linear limiter element for limiting an amplitude of an output of said inverter amplifier symmetrically in a positive and a negative sides, said non-linear limiter element being disposed between an input and an output of said inverter amplifier;
• and
• a first constant-current circuit and a second constant-current circuit capable of adjusting an impedance value by a control current, said first constant-current circuit and said second constant-current circuit being connected between a power supply side terminal of said inverter amplifier and a power supply bus and between a grounding side terminal of said inverter amplifier and a grounding bus, respectively.

A waveform shaping device comprising:

• a ring counter having a plurality of constant-current circuits capable of varying a frequency of clock pulse output by a control current;
• an inverter amplifier for receiving said clock pulses of said ring counter through an alternating current coupling capacitor;
• diodes in anti-parallel connection for limiting an amplitude of an output of said inverter amplifier symmetrically in a positive and a negative sides, said diodes being disposed between an input and an output of said inverter amplifier as feedback elements;
• and
• a first constant-current circuit and a second constant-current circuit capable of adjusting an impedance value by the control current, said first constant-current circuit and said second constant-current circuit being connected between a power supply side terminal of said inverter amplifier and a power supply bus and between a grounding side terminal of said inverter amplifier and a grounding bus, respectively, the control current of the constant-current circuits composing said ring counter and the control current of said first and said second constant-current circuits being adjusted in interlocking each other.